A new iOS app offers a new take on the popular brain-busting sudoku puzzles by slapping on an extra dimension. The same rules as traditional sudoku apply, but now you have to fill in an entire cube. My cranium aches.

The numbered cube can be rotated and zoomed in on, but let's face it, no degree of interface gracefulness is going to make this any easier on your poor brain. But for those of you who laugh at the simple newspaper sudoku puzzles of mortals, this is your next step up—and $1.99 for 1,000 levels sure isn't a bad deal. [iTunes]